Cascade Crew

izcain · Posted: Sun Apr 05, 2009 10:58 pm Post subject: suspension

So im thinking about what torque arm I should be getting and I have seen several good ones out there. I like the BMR but i really am not sure if it is any better or worse then the spohn unit. Does anyone out there have one of these units and how well has it worked for them?

Also deciding on whether the 28X11.50's will fit or to just run the 28X10.50's

Dewey316 · Posted: Sun Apr 05, 2009 11:48 pm Post subject:

If you get the BMR extreme version, since the pivot point of the torque-arm is back further, it will move the rear SVSA Instant Center back further. This "should" help get more weight transfer on launch.

The spohn unit is geometricly (or pretty darned close) identical to the stocke stuff. The added strenght might be nice, and it will have a little less deflection than factory.

I would really look at the BMR unit for what you do with your car. The shorter arm can hurt braking performance, so I wouldn't suggest it to someone who is going to road-race or auto-x their car. But for a mostly drag stip car like yours, the BMR should be the better the choice.

For the tires, how well do you hook up the 10.5's ? No reason to go with more tire, unless you need more traction, and need to run lower tire pressure. If you are having spinning issues out of the hole, then go with the bigger tire, if you dead hook it, save the extra weight and stick with the smaller ones.

--John

91RSVert · Posted: Mon Apr 06, 2009 5:49 am Post subject:

I have a spohn unit. Have had it for 3 years, maybe more.

The only thing I dislike about it is the front joint pops alot. It has about 1/16" play, and when it plays, it pops. He says you just need to make sure its at xx torque (the bolt). But it still pops.

izcain · Posted: Mon Apr 06, 2009 9:58 am Post subject:

Well with the et radials I have they will hook well until the gas is turned on then it's bye bye traction. Thats why I want to transfer to full slicks since the car runs to inconsistent for my liking!

I would like the BMR unit although I cannot seem to find to many installed pics. The car is pretty much all drag anymore anyhow.

91RSVert · Posted: Mon Apr 06, 2009 12:10 pm Post subject:

since I have only dragged it once. I have no clue how much mine really helped.

I know I felt a difference in handling.

Twilightoptics · Posted: Mon Apr 06, 2009 12:14 pm Post subject:

Progressive n20 controller.

izcain · Posted: Mon Apr 06, 2009 5:18 pm Post subject:

Ive got the progressive controller but even on a 100 shot turned to ramp in over 3 seconds or so it still breaks them loose I have tried more or less and it still just won't hold up I would have to have it ramp in over a really long time and thats no fun lol. Thats why I figured if I changed the suspension and tires maybe I can throw the juice and dead hook it.

izcain · Posted: Fri Apr 10, 2009 11:13 pm Post subject:

Well I think I have decided on a few things. One is I have to get a trans blanket installed Embarassed

Didn't realize that 10.90 and quicker requires it. Also I think I am going to take off the lakewood bars and install UMI relocation brackets and reuse the boxed lakewood lca's to save some coin. The torque arm is the next order of business I have been looking at the BMR but I really think that with the slicks I wanna run just a UMI or a spohn unit would be just as well and install easier and make for a cleaner undercarriage.

Going with the 11.50 tire also. Very Happy

After looking at my pinion angle and doing some more in depth shake down on my suspension I am wondering how in the hell I was 60' in 1.52-4 on drag radials Rolling Eyes

These mods along with the 90/10's in front should move out pretty good im hopin!

redlava · Posted: Sat Apr 11, 2009 2:29 pm Post subject:

I read on TGO that a shorter torque arm helps you gain traction like dewey was saying. I also read on TGO that once you get to a certain power level you want a longer torque arm. I dunno know if this is true, but you might want to look into it.

Post 21

http://www.thirdgen.org/techboard/suspension-chassis/456692-torque-arm.html

Post 4

http://www.thirdgen.org/techboard/suspension-chassis/343349-anybody-using-jegs-short.html

Twilightoptics · Posted: Sat Apr 11, 2009 4:41 pm Post subject:

If anything power wise you'd want a shorter one. The shorter arm means less leverage at the forward mount. Thus not having to build it as heavy to overcome the mechanical advantage.

izcain · Posted: Mon Apr 13, 2009 9:10 am Post subject:

seems like there are a ton of opinions but the general consensus is that with a lot of power then go to a longer unit to let the chassis absorb a little bit of the energy applied on launch.

Good articles thanks!

Just got the slicks ordered over the weekend! Very Happy

Twilightoptics · Posted: Mon Apr 13, 2009 10:27 am Post subject:

blue89 · Posted: Mon Apr 13, 2009 1:27 pm Post subject:

Seems like a shorter one would have more leverage on the mount point and therefor allow the axle to twist more. What else would it do?

Twilightoptics · Posted: Mon Apr 13, 2009 3:11 pm Post subject:

rjmcgee · The Hammer Joined: 08 Jan 2004 Posts: 2328

Dewey316 · Posted: Tue Apr 14, 2009 4:22 am Post subject:

Twilightoptics · Posted: Tue Apr 14, 2009 6:33 am Post subject:

Think I'm understanding the text.

izcain · Posted: Wed Apr 15, 2009 9:13 pm Post subject:

Well I decided that I wanted to keep the torque arm a bolt on along with a drive shaft loop and cross member all in one.

I ordered up

UMI Adjustable Torque arm with driveshaft loop
UMI LCRAB's
UMI Double Spherical rod ended LCA's
UMI Double Spherical Rod ended Panhard bar
Lakewood 90/10 Struts

Should have plenty of adjustment now

I will have to remove the driveshaft loop, and lakewood Trac bars I already have installed but this should fit the bill nicely.

Also have a few transmission parts ordered up (Didn't realize that 10.99 and lower requires a shield or blanket) I thought it was a lower time but guess not. Cool

Xophertony · Posted: Thu Apr 16, 2009 8:14 am Post subject:

sweet, win that money and buy more stuff. Smile

izcain · Posted: Thu Apr 16, 2009 5:59 pm Post subject:

haha ya not that I think I have a shot in hell at winning anything but it's a good excuse to get the car up to snuff for coming days! Very Happy